Beam.



D. B. LUTEN.

. BEAM.

APPLICATION FILED NOV. 28, 1910.

1,089,487, Patented Mar. 10, 191i 5 I i/ f 7 .110 all whom it may concern.-

DANI'EL B ILUYTENIK o INDIANAPOLIS, INDIANA.

AM, v

' lie it known that I, Dimitri B. LUTFLN;

'a" citizen of-tlie United state's residi'ng at Indianapolis,- inthecounty of Marion and- State of Indiana, have invented a new'and 'iisefiil Improvement-i i Beams, vof wh ch the.

iollow ngfis' a. specification. e

invention relates to mprovements-4n, reinforcementfforconcrete beams whereby the beams .arenotonly strengthened 'vith .ened in cost by reason of greater facility of construc't' on'." :1

-; The invention is llustrated in the 'accom panying' drawings in which the: same refervenee characters designate like parts through out'the several vieivs, and in whicli v Figure l is alongitu'dinal' section throiwh i r a'beam and its si'ipports,-aiid Fig. 2 is a ne- 201 I J A concrete beam' requires; reinforcement tail view, of the reinforcing members.

throughout allthe tension regions induced -end s in-wh c'h case tension regions Wlll ocby any possible arrangement of loading. The loaded surface of tlie jbea'in will have no tension regions unless the-beam has fixed c'iirabove the supports. .But the unloaded surface "of the beam will have tension throughout mostv of the span, and reaching itsfigreate'st values, near the middle of the span. [There will also be areas Fhdi'a'gonal tension extendingthrough the thickness/of ,v

thefb'eam for perhaps one fo'urthf oftlie.

'span' from each support. V

'A reinforcing ii'iemb'er gliQhitS 1- iii Fi g. -2, .tvhenjembedded in the beam 5 asnshowi in i Fi' g. 1. will reinforce the:tension regions throughout. most of the'junloaded surface;

and by passing diagonally-upward through the beam as at-l, Willxreinfo'rc-e inpart the area. "of, diagona'l tension" an'd 'nay also extend-through a region of tensionover the a support 6 although this feature is useful ,for

tension only in case the beam be continuous or have fixed ends. A' short'exten'sion' at the endjof-xthe diagonal would be useful; for anchorage-many event.- If new thisbar be; qcoinbined'with such a bar as 3 of Fig. 2, of-

identical -form' but reversed in position,v in

' W 0"th-e bear'nof Fig. 1, the unloaded face? of 1 the beam will be reintorcedthroughoutand with maximum reinforcement near the middle-of the spanwhere it .is desirable since the weight of the beam and the applied loads produce maximum tension in that region-. This pair of reinforcing members Specification dieters Patent. nppiioati'on filed Nevember'28,1910.' seriarn MAsa' tensionlregions 8 as at 1; 2,3, and {L The throughout all possible tension. regions,- and diagonal tension -regions are also: reinforced may be desiredinayb-e had for the diagonal -"\{ariati'on from min-inning maximum rein;

to suit the degreeof-tension;

sho v'nfon the drawing-land resulting in for the complete structure.

II clftlnij "sion memb'ers, each offs'aid members follownally reversed in 'the beain; and two others the beam than are the points oi"- crossing oi the first twomembers,corresponding endsof same verticalplanes; l i

2. A beam of hardened plastic embodying two series of'einbedded' tension members the tension'meinbers of both series being sub- 'stantially idei'itical in eifective length with nectedby an intermediate inclined portion,

vvith-tl'ie unloaded surface reinforced with. Bo ted s near thei'support, wviththree rods at aboutthe quarter span and with "four rods atthe middle of the s'pamthe' reinforce ment thus increasing with the tensio'iig The v f-All of the {our rein-for fng members may be: in-adeidentical in form and-still becoinbinedto performthe -a'bove function with the advantage that but one lay-out plan for a the bending-of the i-einforceni ent eed '85 reat 'simplieitv of reinforcementrequired 1.;A- beam reinforced \vitli embedded ten of said- 'm'ernbe rsbeing similarly arranged] but crossing thd beaninearer the center of the initial ends oi the several members'of a PatentedMar. 10,1914. 1f Y may be combined with another pair of nem- I bers as 2 and 4 of Fig. 2; similar except that" the diagonals cross the beam at difi'ere'nt poii t's,' thus distributing the diagonal res-4 nforcing members throughout the diagonal combinihgof' the-four rods as shown inig, 1 thus results .in abcan reinforced n ,Witlildistributedftension members." And by j. multiplying the, number of reinfoi'cing- 'ineinbe'rs,,-any degree of distribution that" l 1 v v tension regions a t"the same time. that the' -forc'einent inthe .iinload'ed face may bc'n ade ing the unl'oaded' face of-the beam 'closelynear one end and along the middle of the f beam and crossingthe beam near "the oppo -gj q site end "of the: beam-two of said members beingsubstantiallyidentical but longitudi 9'15" all said members being substantially in the their'correspondingendssubstantially the. f, same vertical planes and eachv member of, V, each series comprising two substantiallv.

parallel portions ofdifi'erent lengths eon-, tie a f series difiering in length whereby the inclined intermediate connecting portions may be distributed along the length of the beam, and the members of one series being ar ranged opposite to the members of the other series.

3. In combination, a beamof hardened plastic, and a plurality of tension members embedded-in said beam and each comprising two substantially parallel end portions respectively near the upper and lower surfaces of the beam and joined by an intermediate oblique portion, some of said tension members being longitudinally reversed in position with respect to others and some having their oblique portions nearer the elevated ends than have others, the elevated end portions being over the beam supports with their ends all substantially in the same vertical planes.

4. A beam reinforced with embedded tension members, in two sets, each of said members having a portion adjacent the middle part of the unloaded face of the beam and adiagonal portion crossing the beam at one end only of said first named portion and an end portion projecting from the end of the diagonal portion, the end portions on the two sets being of unequal length and closely following the loaded face of the beam, said reinforcing members being rcversely embedded in pairs so that the diagonal portions cross the beam at different distances from the middle of the span. I

5. A beam reinforced with embedded tension members, in two sets, the members of each set all being substantially identical, each of said members comprising a portion adjacent the unloaded face of the beam from one end of the beam to a point on the opposite side of thecenter of the beam and a diagonal portion extending from said last named end of the first portion across the beam toward the loaded face ofithe beam and an end portion extending from the diagonal portion and located adjacent the loaded face of the beam, some of the reinforcing members of each set being reversed with respect toother members of said set, and the first named portlons of the two sets Copies of thin patent may be obtained for being of different lengths, so that the diago- I named end of the first portion across the beam toward the loaded face of the beam, some of thereinforeing members of. each set being reversed with respect to other m e1n bers of said set, and the first named portions of the two sets being of different lengths, so that the diagonal portions cross the beam on both sides of the center thereof at different distances from such center.

'7. A reinforcing for concrete beams, comprising a set of substantially identical tension men'ibers, each nonsymmetrical on opposite sides of its center. said members being turned end for end with respect to one another and each arranged to cross the beam diagonally near one end-and to follow one face of the beam closely near the middle of the beam, and a second setof substantially identical tension members, each nonsym metrical on opposite sides of its center, said members of said second set also being turned end for end with respect to one another and each arranged to cross the beam diagonally near one end and to follow one face of the beam closely near the middle of the beam,

the tension members of said two sets differing from each other in having their diagonal portions at different distances from the centers of the members.

In witness whereof, I'have hereunto set my hand ands al at Indianapolis, Indiana,

this 16th day of November, A. D. one thousand nine hundred and ten.

DANIEL B. LUTEN. [n s.]

lVitnesses Fnaxn A. FAHLE, ARTHUR M. H001).

five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

